TM 9-2320-365-24P23.ExplanationofColumns(SectionsIIandIII).a.ITEMNO.(Column(1)). Indicates the number used to identify items called out in the illustration.b.SMRCODE(Column(2)). The Source, Maintenance, and Recoverability (SMR) code is a 5-position codecontaining supply/requisitioning information, maintenance category authorization criteria, and dispositioninstruction, as shown in the following breakout:*Complete Repair: Maintenance capacity, capability, and authority to perform all corrective maintenance tasksof the "Repair" function in a use/user environment in order to restore serviceability to a failed item.(1) SourceCode. The source code tells you how to get an item needed for maintenance, repair, oroverhaul of an end item/equipment. Explanation of source codes follows:Code ExplanationStocked items; use the applicable NSN to request/requisition items with thesesource codes. They are authorized to the category indicated by the codeentered in the 3rdposition of the SMR code.**NOTE: Items coded PC are subject to deterioration.PAPBPCPDPEPFPGSourceCodeMaintenanceCodeRecoverabilityCodeXXHow you get an itemHow you get an itemWho determineddisposition action onan unserviceableitem3rd positionWho can install,replace, usethe item4th positionWho can docompleterepair onthe itemXXXX1st twopositions